package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setMealDishMapper;
    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlaver(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        //获取inster语句生成 的主键值
        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insterBath(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }
    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional
    public void deleteBath(List<Long> ids) {
        //1.判断当前菜品能不能删-----起售中的菜品不可以删
        for (Long id : ids) {
           Dish dish = dishMapper.getByid(id);
           if(dish.getStatus() == StatusConstant.ENABLE){
               //菜品处于起售中 不能删除 抛异常
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }
        //2.判断当前菜品能不能删-----关联套餐的菜品不能删除
        List<Long> setmealIds =  setMealDishMapper.getSetMealDishIds(ids);
        if( setmealIds != null &&setmealIds.size()> 0 ){
            //菜品关联了套餐
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //3.删除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //批量刪除口味数据
        dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    public DishVO getByidWithFavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getByid(id);
        //根据菜品id查询口味数据
       List<DishFlavor> dishFlavors =  dishFlavorMapper.getByDishId(id);
        //查询结果封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 根据id修改菜品和口味信息
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //修改口味 ---- 先删口味后新增口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());


        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insterBath(flavors);
        }

    }


    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> getByCategoryId(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.getByCategoryId(dish);
    }

    @Override
    public void startOrStop(Integer status, long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
    }

}
